Power mechanism.



No. 813,757. PATENTED FEB. 27, 1906. J. W. WIHLBORG. POWER MEGHANISM.

APPLICATION FILED Mums. 1905.

z SHEETS-SHEET 1.

WIT /NVENO/e JOHN W. WIHLBORG, OFv CHICAGO, ILLINOIS.

POWER NIECHANISIVI.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Application filed March 23, 1905. Serial No. 251,611.

To a/ZZ whom it may concern.-

Beit known that I, JOHN W. WIHLBORG, ay subject of the King of Swedenand Norway, residing at Chicago, in the county of Cook and State ofIllinois, have invented new and useful Improvements in Power Mechanism,of which the following is a specification.

This invention relates to devices 'for transmitting motion from treadlesto a shaft and the object of the invention is to provide an improved andeasy-running connection for that purpose.

In the accompanying drawings, Figure l is a sectional plan view of thetreadles and the connections to the drive-shaft. Fig. 2 is a horizontalsectional view of the grip mechanism. Fig. 3 is a side view, partly insection, showing the clutch or grip mechanism and bearings on the mainshaft. Fig. 4 is a view similar to Fig. 3 with the parts in differentpositions. Fig. 5 is a view of a modification, showing a more directconnection between the treadles and the grip mechanism.

Referring specifically to the drawings, A indicates the usual stationaryframe or iron supports for a sewing or other machine.

B is the cross-bar on which the treadles run. These treadles C and D aremounted upon sleeves C and D, respectively, upon the bar B, and thesesleeves are supported on ballbearings b and b', respectively. The coneof the bearing b backs against the treadle C, and the treadles are thusspaced apart. One sleeve is arranged within the other, as shown. Thusthe sleeve C of the treadle C extends through the sleeve D of thetreadle D, the ballbearings b supporting the sleeve C upon the rod B andthe ballbearings b supporting the -sleeve D upon the sleeve C.

At one end the sleeve C/ carries a rigid arm C2, located convenientlybeside an arm. D2, projecting from the treadle D, bringing theconnecting-rods c and d, by which the motion is communicated,vto oneside of the machine` The connecting-rods c and d, referred to, arepivotally attached at one end, as at X, to the -treadle-arms and at theother end are connected to the clutch mechanisms, (indicated at G and F,respectively,) operating to drive the shaft J, which carries a fly-wheelH and is supported in bearings I on the frame of the machine. The end ofeach rod c and d is shaped to form one of a pair of arms f, the

other, f2, of which is pivoted thereto by a bolt m, held by a nut m.

Each of the arms f is connected by a ballbearing joint at f3 with aprojection f5, eX- tending from a circular housing L, which extendsaround the drive-shaft J, and each of the arms f2 is similarly connectedto a projectionf, extending from a similar housing. The housing Lincloses blocks 71:5, whichcause the balls k2 to engage the shaft'J whenthe housing is turned in one direction by means of the interior lugs orshoulders Z, which press the springs 764 against said blocks and causethem to force the balls k2 in the narrow or reduced end of the recessesZ,.which are formed within the housing around said shaft.

When the rod c or d is thrust out, it spreads the arms ffz, vasindicated in Fig. 3, and when it is pulled in the other direction itdraws the arms together, as indicated in Fig. 4. The clutches carried bythe respective arms operate oppositely, so that one takes on the thrustand the other on the pull, and the shaft is lintermittently gripped andis caused to rotate always in the same direction. Rubber cushions(indicated at Z) are interposed between the arms to deaden the noise oftheir coming together.

In the modification shown in Fig. 5 the arms f are connected directly tothe treadles, as by a pivot at y, and will belfound servicee able undersome conditions.

The clutches connected to each treadle are independently operated. Conseuently either one or both treadles may be usel also, since the clutchesdo not grip except when the treadle is moved either one or both treadlesmay be held still and the shaft will continue to rotate.

What I claim as new, and desire to secure by Letters Patent, is

The combination with a treadle, of a connecting-rod pivotally connectedat one end thereto and shaped at the other end to form one of a pair Vofarms, the other armof said pair hinged to said rod, a shaft, and clutchconnections between the arms and the shaft. In vtestimony whereof I havesigned my name to this specification in the presence of two subscribingwitnesses.

u JOHN W. WIHLBORG. Witnesses:

SIGNA FELTsKoG, H. G. BATcHELoR.

IOO

